摘要
不同于传统的信号域随机噪声压制方法,Kirchhoff叠前时间偏移/反偏移是一种基于地震数据映射的随机噪声压制方法。该方法一方面利用数据映射算子的共轭特性,保证了有效信号在偏移/反偏移处理后的良好恢复;另一方面利用偏移/反偏移过程中包含的叠加运算,达到了增强有效信号、压制随机噪声的目的。简要介绍了Kirchhoff偏移/反偏移算法的基本理论及其去噪原理,讨论分析了算法实现过程中偏移孔径、加权函数、反假频滤波因子等重要参数的选取。最后,通过模型数据的测试和实际资料的处理验证了Kirchhoff叠前时间偏移/反偏移叠前去噪方法的随机噪声压制效果。
Different from the conventional denoising approaches,Kirchhoff prestack migration/demigration is a random noise suppression method based on seismic data mapping.On the one side,it exploits the conjugate characteristics of data mapping operators,which ensures the recovery of the effective signals after migration/demigration processing.On the other side,it exploits the fold computation contained in migration/demigration to enhance effective signals and suppress random noise.The basic theory and principles of de-noising of Kirchhoff migration/demigration is firstly introduced,and then the criteria of migration aperture,weighting function,antialiasing filter factors and other parameters are discussed.Finally, the validity of the Kirchhoff prestack migration/demigration random noise suppression method is verified by the numerical model and the actual seismic data.
出处
《石油物探》
EI
CSCD
北大核心
2013年第5期530-536,444,共7页
Geophysical Prospecting For Petroleum
